| List Orders | Read | List orders across all connected shops, optionally filtered by date range, modification time, or order state |
| Get Order | Read | Get a single order with positions, addresses, and payment details by its internal Billbee ID |
| Update Order State | Write | Change the main state of an order, e.g. mark it as confirmed, paid, or shipped |
| List Products | Read | List products (articles) in the Billbee account |
| List Customers | Read | List customers in the Billbee account |
| List Invoices | Read | List invoices with positions and amounts over a date range - the export feed into accounting tools. Throttled to 1 request per minute for the same page and minInvoiceDate. |
| Get Order States | Read | List all defined order state IDs and names - resolves the NewStateId values used by Update Order State |
| Update Stock | Write | Set the absolute stock quantity of a product by SKU or Billbee product ID - the most common multichannel write; the change is pushed to connected shops |